"The afternoon is the time when we do see the peak of the temperatures and often the winds do really flare up in the afternoon," she said.

Major fires at Yass, Cooma and Sussex Inlet, in the state's south, continue to cause crews the most concern.

The heatwave conditions that triggered many of the fires earlier this week are expected to return tomorrow, but weaker winds mean the state is unlikely to experience Tuesday's catastrophic fire conditions.